1. Rice production is a significant source of greenhouse gas emissions in several Asian countries such as Vietnam and India, accounting for up to 38% and 5.7% of total national emissions respectively. 2. Alternate wetting and drying (AWD), a water saving irrigation technique, has been shown to reduce methane and nitrous oxide emissions from rice fields by up to 37% with no reduction in yield. AWD involves intermittent flooding and drainage of rice fields. 3. The International Rice Research Institute is providing technical support for climate change mitigation policies in several ways, including developing Clean Development Mechanism projects using AWD, mapping suitability of AWD adoption, and assisting countries in creating national action plans and